package com.ecnu.web.controller.common;

import com.ecnu.common.config.RuoYiConfig;
import com.ecnu.common.constant.Constants;
import com.ecnu.common.core.domain.AjaxResult;
import com.ecnu.common.utils.StringUtils;
import com.ecnu.common.utils.file.FileUploadUtils;
import com.ecnu.common.utils.file.FileUtils;
import com.ecnu.common.utils.http.UrlUtils;
import com.ecnu.framework.config.ServerConfig;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.MediaType;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.*;

/**
 * 通用请求处理
 *
 * @author ruoyi
 */
@Api(tags = "文件上传和下载")
@RestController
@RequestMapping("/common")
public class CommonController {
    private static final Logger log = LoggerFactory.getLogger(CommonController.class);

    @Autowired
    private ServerConfig serverConfig;

    private static final String FILE_DELIMETER = ",";

    /**
     * 通用下载请求
     *
     * @param fileName 文件名称
     * @param delete   是否删除
     */
    @PostMapping("/download")
    @ApiOperation(value = "下载文件（本地资源）")
    public void fileDownload(String fileName, Boolean delete, HttpServletResponse response, HttpServletRequest request) {
        try {
            if (!FileUtils.checkAllowDownload(fileName)) {
                throw new Exception(StringUtils.format("文件名称({})非法，不允许下载。 ", fileName));
            }
            String realFileName = System.currentTimeMillis() + fileName.substring(fileName.indexOf("_") + 1);
            String filePath = RuoYiConfig.getUploadPath() + fileName;

            response.setContentType(MediaType.APPLICATION_OCTET_STREAM_VALUE);
            FileUtils.setAttachmentResponseHeader(response, realFileName);
            FileUtils.writeBytes(filePath, response.getOutputStream());
            if (delete) {
                FileUtils.deleteFile(filePath);
            }
        } catch (Exception e) {
            log.error("下载文件失败", e);
        }
    }

    /**
     * 通用上传请求（单个）
     */
    @PostMapping("/upload")
    @ApiOperation(value = "通用上传请求（单个）")
    public AjaxResult uploadFile(@RequestPart MultipartFile file) throws Exception {
        try {
            // 上传文件路径
            String filePath = RuoYiConfig.getUploadPath();
            // 上传并返回新文件名称
            String fileName = FileUploadUtils.upload(filePath, file);
//            String url = serverConfig.getUrl() +"/prod-api"+ fileName;
            String url = UrlUtils.getUrl() + fileName;
            AjaxResult ajax = AjaxResult.success();
            ajax.put("url", fileName);//相对地址
            ajax.put("name", file.getOriginalFilename());//文件名称
            ajax.put("fullurl",url);//文件带IP的绝对地址
            ajax.put("createTime",new Date());
//            ajax.put("url", url);
            //            ajax.put("fileName", fileName);
//            ajax.put("newFileName", FileUtils.getName(fileName));
//            ajax.put("originalFilename", file.getOriginalFilename());
            return ajax;
        } catch (Exception e) {
            return AjaxResult.error(e.getMessage());
        }
    }

    @PostMapping("/uploadList")
    @ApiOperation(value = "通用上传请求(多个文件）")
    public AjaxResult uploadFileList(@RequestParam("file") MultipartFile[] file) throws Exception {
        try {
            AjaxResult ajax = AjaxResult.success();
            LinkedList<Map<String, Object>> maps = new LinkedList<>();
            for (MultipartFile multipartFile : file) {
                Map<String, Object> map = new HashMap<>();
                // 上传文件路径
                String filePath = RuoYiConfig.getUploadPath();
                // 上传并返回新文件名称
                String fileName = FileUploadUtils.upload(filePath, multipartFile);
//                String url = serverConfig.getUrl() +"/prod-api"+ fileName;
                String url = UrlUtils.getUrl()+ fileName;
                map.put("url", fileName);//相对地址
                map.put("name", multipartFile.getOriginalFilename());//文件名称
                map.put("fullurl",url);//文件带IP的绝对地址
                map.put("createTime",new Date());
                maps.add(map);
            }
            ajax.put("data", maps);
            return ajax;
        } catch (Exception e) {
            return AjaxResult.error(e.getMessage());
        }
    }

    /**
     * 通用上传请求（多个）
     */
    @PostMapping("/uploads")
    public AjaxResult uploadFiles(MultipartFile[] files) throws Exception {
        try {
            // 上传文件路径
            String filePath = RuoYiConfig.getUploadPath();
            List<String> urls = new ArrayList<String>();
            List<String> fileNames = new ArrayList<String>();
            List<String> newFileNames = new ArrayList<String>();
            List<String> originalFilenames = new ArrayList<String>();
            for (MultipartFile file : files) {
                // 上传并返回新文件名称
                String fileName = FileUploadUtils.upload(filePath, file);
                String url =  serverConfig.getUrl() + fileName;
//                urls.add(fileName);
                urls.add(url);
//                fileNames.add(fileName);
//                newFileNames.add(FileUtils.getName(fileName));
                originalFilenames.add(file.getOriginalFilename());
            }
            AjaxResult ajax = AjaxResult.success();
            ajax.put("urls", StringUtils.join(originalFilenames, FILE_DELIMETER));//文件相对地址
//            ajax.put("fileNames", StringUtils.join(fileNames, FILE_DELIMETER));
//            ajax.put("newFileNames", StringUtils.join(newFileNames, FILE_DELIMETER));
            ajax.put("names", StringUtils.join(originalFilenames, FILE_DELIMETER));//文件名
            ajax.put("fullurl",StringUtils.join(urls, FILE_DELIMETER));//文件带IP的绝对地址

            ajax.put("createTime",new Date());
            return ajax;
        } catch (Exception e) {
            return AjaxResult.error(e.getMessage());
        }
    }

    /**
     * 本地资源通用下载
     */
    @ApiOperation(value = "本地资源通用下载（刚上传的资源）")
    @GetMapping("/download/resource")
    public void resourceDownload(String resource, HttpServletRequest request, HttpServletResponse response)
            throws Exception {
        try {
            if (!FileUtils.checkAllowDownload(resource)) {
                throw new Exception(StringUtils.format("资源文件({})非法，不允许下载。 ", resource));
            }
            // 本地资源路径
            String localPath = RuoYiConfig.getProfile();
            // 数据库资源地址
            String downloadPath = localPath + StringUtils.substringAfter(resource, Constants.RESOURCE_PREFIX);
            // 下载名称
            String downloadName = StringUtils.substringAfterLast(downloadPath, "/");
            response.setContentType(MediaType.APPLICATION_OCTET_STREAM_VALUE);
            FileUtils.setAttachmentResponseHeader(response, downloadName);
            FileUtils.writeBytes(downloadPath, response.getOutputStream());
        } catch (Exception e) {
            log.error("下载文件失败", e);
        }
    }
}
